We have been using Wolfgang's for three years to keep our aging BMW on the road. Quite a bit of work has been done and compared to another local independent BMW shop, Wolfgang's has saved us a lot of money. We have always had good service. Once a catalytic converter failed under warranty and it was re-replaced without question. They work on multiple marques and we were referred from an Alfa-owning neighbor. I am very happy with Wolfgang's and will continue to go back.